Bag



Sept. 19, 1967 E. KARDON 3,342,402

Y BAG ile May 17, 1965 r I 2 Sheets-Sheet 1 F I G. I.

F I G. 3.

INVENTOR EMANUEL S. KARDON ATTQR P 1967 EfSgKARDON 3,342,402

BAG

Filed May 17, 1965 2 Sheets-Sheet 2 FIG. 5.

FIG. 7.

INVENTOR EMANUEL S. KARDON ATTORNEYS United States Patent Filed May 17,1965, Ser. No. 456,141 Claims. (Cl. 22960) This invention relates tobags and a method of bag making and, more specifically, to theconstruction of the bottom of a bag of the automatic or self-openingtype.

It is the general object of this invention to provide a bag of theindicated type with an insert which is positioned Within the bottomfolds of the bottom construction. Many materials which are sold in bagsrequire that there be accompanied with the bag a brochure ofinstructions or the like or an envelope containing additional material,such as a packet of seeds. In the past, these inserts have generallybeen located inside the bag so that it is necessary to open the top ofthe bag in order to obtain access to the insert. This prior arrangementinvolves several disadvantages. For example, sometimes the insert iscovered completely by the ingredients of the bag and is diflicult tofind. Moreover, there is no way of determining if the bag does notcontain this essential insert without opening the bag. In accordancewith applicants bag construction, there is provided an insert which isin view and is easily accessible.

The objects and features of the invention will become apparent from aconsideration of the following description taken in conjunction with theaccompanying drawings, wherein:

FIGURE 1 is a perspective view of a tube from which the bag embodyingthe present invention may be made;

FIGURE 2 is another view of the bag shown in FIG- URE 1 illustrating astep in the method of formation of the bottom of the bag;

FIGURE 3 is a plan view illustrating a subsequent step in the formationof the bag bottom;

FIGURE 4 is a plan view illustrating a further step in the formation ofthe bag bottom;

FIGURE 5 is a plan view illustrating a still further step in theformation of the bag bottom involving the insertion of the insert withinthe bottom folds;

FIGURE 6 is a plan view illustrating an alternate method ofincorporating the insert within the bottom folds of the bag; and

FIGURE 7 is a perspective view illustrating the completed bag bottomcontaining the insert therein.

The bag shown in the drawings illustrating the present invention issimilar to that disclosed in US. Patent No. 2,496,796 to E. S. Kardon,the essential difference being the provision of the insert as describedbelow. The bag comprises an outer sheet 10, which may be made of paperor another suitable material, and an inner lining 12, which may be madeof an impervious, heat-sealable material so that the bag may be sealedagainst outside air and moisture by heat sealing the lining in a mannerto be described hereinafter. In the preferred embodiment, inner lining12 is made of a separate sheet of heat-seal able material so that theoverlapping faces of the lining may be caused to adhere to each otherupon the application of heat thereto. However, it is to be noted thatthe sealing may be effected by the application of an adhesive at thedesired places to cause the lining faces to adhere to each other at suchplaces.

The bag of this invention is made from an intucked, fiat bag tube suchas the one shown in FIGURE 1 and which may be made by one of theautomatic bag making machines well known in the art. As shown in FIGURE2, a pair of spaced parallel slits 20 are formed at the bottom of theother side 15 of the tube. Slits 20 extend longitudinally from thebottom edge of the tube and are spaced equidistantly from thelongitudinal edges of side 15. Slits 20 extend through both the outersheet 10 and the liner 12 to provide a double ply tab portion 22.

The bottom end of the tube is then formed into a diamond fold as shownin FIGURE 3 with the tab portion 22 located at one end and providingupwardly extending flaps 24 in the center of the fold. The outer facesof flaps 24 are comprised of a portion of the outer sheet 10 which has atwo ply thickness of each sealable lining 12 therebetween. Flaps 24 areunited by a vertical fold 26 which is at the apex of the inner triangle30 of the diamond fold whereby there will be no opening in this areawhen the bottom of the bag is sealed as will be described hereafter.

While the bottom of the bag is being folded into the position shown inFIGURE 3, heat is applied at right angles to flaps 24 as is shown by thearrows in FIGURE 3. The heat is applied in an amount necessary to causethe opposing faces of the portion of lining 12 within flaps 24 to adhereto each other and thereby seal the entire length thereof. Flaps 24 arethen folded to the position shown in FIGURE 4 and lie flush with theplane of the formed portion of the bag bottom.

While the bag bottom is in the condition shown in FIGURE 4 of thedrawings, heat is applied across the protruding tab portion 28 of thebag bottom along the transverse line 32-32 which is located between thetab portion 28 and the fold or crease line 19, upon which the final foldof the bottom portion will be made.

The bottom of the bag is provided with a small glue deposit 33 in aregion such that when the insert is positioned within the bottom flap,the insert will overlie the glue deposit. This deposit 33 is shown inFIGURE 4.

The triangular tab portion 30 of the diamond folded bottom is now bentover along the fold or crease line 21 and the insert 40 is positionedbetween the triangular portion 30 and the rectangular bottom of the bagbetween the crease lines 19 and 21. The insert 40 will be fixed inposition by adhesive contact with the glue deposit 33 on the bottomportion. The portion 28 with the tab 22 extending therefrom is foldedover along the crease line 19 to complete the formation of the bottom.Prior to this last step, a portion of the outer bottom face of thefolded triangular portion 30' has adhesive applied thereto in a region42 such that when the portion 30 and tab 22 are folded over they willhave the adhesive therebetween and be held in position. It is importantthat the adhesive be limited to this region so that only the bottomfolds are secured together and not to the rectangular bottom portion orthe insert. Thus, the tab portion 22 is caused to adhere to the bottomof the bag by the application of this suitable adhesive between thecontiguous faces of the tab portion 22 and the triangular portion 30 ofthe bag bottom structure.

The completed bag construction is shown in FIGURE 7. It will be apparentthat the bag will have an appropriate notation at some prominentlocation referring to the insert Within the bottom flaps of the bag.

It will be seen that a bag constructed as described above will have thebottom effectively closed and sealed to prevent any sifting of finelypowdered contents through the bottom and to prevent any passage of airor vapor through the bottom which might tend to deteriorate the contentsof the bag when it is in a filled condition.

FIGURE 6 illustrates an alternate procedure for placing the insert inthe bag bottom construction. In this alternate procedure the bag bottomis formed essentially as described above with the triangular portion 30being folded along the crease 21 and the tab portion 22 being foldedalong the crease 19 and secured into the folded condition by theadhesive 42. The insert 40 is then inserted by movement thereof in thedirection of the arrow shown in FIGURE 6 into the space between thebottom flaps and the rectangular bottom portion of the bag. In thisprocedure it is essential that the insert 40 be inserted from the openend of the bottom structure opposite to that adjacent the edge 3-9 ofthe flaps 24. This is desirable because the edge 39 tends to interferewith the insertion of the insert 40 from the opposite direction.However, when inserted as shown in FIGURE 6, there is no suchinterference. It is to be noted that the insert will be held in positionin the bag bottom even without the provision of the spot of glue asdescribed above. This is because of the rather substantial frictionalcontact between the bottom folds and the bottom of the bag, and becausethe contents of the bag provide a substantial force downwardly to holdthe insert in position. When no adhesive for securing the insert isused, it is desirable that the insert be substantially the same size asthe bag bottom so that it extends within the regions of the folds 19 and21.

It is to be understood that the invention is to be applicable to unlinedbags as well as lined bags. In the case of unlined bags it will beunderstood. that suitable adhesives will be applied at the appropriateplaces to cause appropriate abutting faces to adhere. Accordingly, it isnot desired to be limited except as required by the following claims.

What is claimed is:

1. A bag comprising a tubular member collapsible to a flattenedcondition for forming a pair of oppositely disposed walls, a diamondfold at the bottom of the bag forming at its ends a pair of bottom foldportions, said bottom fold portions being folded over along parallelspaced fold lines forming side edges of the bag bottom, the portion ofthe diamond fold between said fold lines being rectangular, said bottomfold portions being constructed to overlap one another in the foldedcondition thereof, the outer bottom fold portion being secured to theinner bottom fold portion, which is adjacent the rectangular bottomportion, by adhesive located only in a region where said bottom foldportions overlap and between the opposed faces of the overlappingregions, and an insert member positioned between the rectangular bottomportion and the portions of said bottom fold portions overlapping thesame, said insert member and said rectangular bottom portion and saidbottom fold portions being unsecured together and being in cooperativefrictional engagement for retaining said insert member in the bag bottomwhile permitting removal of said insert member from its frictionallyretained position in the bag without any substantial destruction of theinsert memher or the bag.

2. A bag according to claim 1 comprising adhesive means securing a smallportion of said insert member to a portion of the bag bottom.

3. A bag according to claim 1 wherein said insert member issubstantially rectangular and has a pair of side edges located proximateto said fold lines for said bottom fold portions and wherein the onlyengagement bet-ween said insert member and the bag is said frictionalengagement.

4. A bag comprising a tubular member collapsible to a flattenedcondition for forming a pair of oppositely disposed walls, a bottomconstruction having a pair of bottom fold portions, means securing saidbottom fold portions together, and an insert member positioned betweensaid bottom fold portions and a portion of the bag bottom adjacentthereto, said insert member and said bottom portion and said bottom foldportions being in cooperative frictional engagement for retaining saidinsert member in the bag bottom while permitting removal of said insertmember from its retained position in the bag without any substantialdestruction of the insert member. I

5. A bag comprising a tubular member collapsible to a flattenedcondition for forming a pair of oppositely disposed walls, a bottomconstruction having a pair of overlapping bottom fold portions, saidbottom fold portions being secured together adhesively in theoverlapping region thereof, and an insert member positioned between saidbottom fold portions and a portion of the bag bottom adjacent thereto,said insert member and said bag bottom portion and said bottom foldportions being in cooperative frictional engagement for retaining saidinsert member in the bag bottom while permitting removal of said insertfrom its retained position in the bag without tearing of the insertmember or the bag.

References Cited UNITED STATES PATENTS 1,967,204 7/1934 Genz.

2,088,232 7/1937 Cumming 229-62 2,353,311 7/1944 Karlson 93 -352,353,402 7/1944 Haslacher 93 -35 2,460,888 2/1949 Happe 229 592,496,796 9/1950 Kardon 229 56 2,777,574 1/1957 Brody 229-56 2,867,3721/1959 Fox 229-56 2,998,911 9/1961 Hahn et al 229-66 JOSEPH R. LECLAIR,Primary Examiner.

DAVID M. BOCKENEK, Assistant Examiner.

1. A BAG COMPRISING A TUBULAR MEMBER COLLAPSIBLE TO A FLATTENEDCONDITION FOR FORMING A PAIR OF OPPOSITELY DISPOSED WALLS, A DIAMONDFOLD AT THE BOTTOM OF THE BAG FORMING AT ITS ENDS A PAIR OF BOTTOM FOLDPORTIONS, SAID BOTTOM FOLD PORTIONS BEING FOLDED OVER ALONG PARALLELSPACED FOLD LINES FORMING SIDE EDGES OF THE BAG BOTTOM, THE PORTION OFTHE DIAMOND FOLD BETWEEN SAID FOLD LINES BEING RECTANGULAR, SAID BOTTOMFOLD PORTIONS BEING CONSTRUCTED TO OVERLAP ONE ANOTHER IN THE FOLDEDCONDITION THEREOF, THE OUTER BOTTOM FOLD PORTION BEING SECURED TO THEINNER BOTTOM FOLD PORTION, WHICH IS ADJACENT THE RECTANGULAR BOTTOMPORTION, BY ADHESIVE LOCATED ONLY IN A REGION WHERE SAID BOTTOM FOLDPORTIONS OVERLAP AND BETWEEN THE OPPOSED FACES OF THE OVERLAPPINGREGIONS, AND AN INSERT MEMBER POSITIONED BETWEEN THE RECTANGULAR BOTTOMPORTION AND THE PORTIONS OF SAID BOTTOM FOLD PORTIONS OVERLAPPING THESAME, SAID INSERT MEMBER AND SAID RECTANGULAR BOTTOM PORTION AND SAIDBOTTOM FOLD PORTIONS BEING UNSECURED TOGETHER AND BEING IN COOPERATIVEFRICTIONAL ENGAGEMENT FOR RETAINING SAID INSERT MEMBER IN THE BAG BOTTOMWHILE PERMITTING REMOVAL OF SAID INSERT MEMBER FROM ITS FRICTIONALLYRETAINED POSITION IN THE BAG WITHOUT ANY SUBSTANTIAL DESTRUCTION OF THEINSERT MEMBER OR THE BAG.